Crawfurd, John. "Journal of an Embassy from the Governor-general of India to the Courts of Siam and Cochin China". H. Colburn and R. Bentley, 1830. p. 419 (页面存档备份,存于互联网档案馆).
Crawfurd, John. "Journal of an Embassy from the Governor-general of India to the Courts of Siam and Cochin China". H. Colburn and R. Bentley, 1830. p. 419 (页面存档备份,存于互联网档案馆).